Or maybe I just rushed it :(

It seems super hard though. I used the slow - not extra slow. Sounds like the meniscus on mine was about right then. Still amazes me how this works. I could not get the frame level in all directions due to an apparent twist. But no matter which way I put this level, all I see is:

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Granted, that is just a (high quality) carpenter's level, but still pretty cool.

Thanks,
Wally